INDUSTRIAL AUTOMATION
D4SL-N4EFA-D
Omron
Omron D4SL-N4EFA-D. Reference photograph supplied by Zhenxin Industrial; the image may show the product, its nameplate or labelled packaging. Confirm the complete ordering code, revision, condition and required quantity before quotation.
This page identifies a sourcing reference. It does not guarantee continuous stock. Availability, condition, quantity, lead time, and commercial terms are confirmed after inquiry.
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Reference details
- Manufacturer / brand
- Omron
- Model / reference
- D4SL-N4EFA-D
- Series / type
- Confirm against nameplate
- Condition
- Confirm with inquiry
- Quantity
- Confirm with inquiry
- Lead time
- Confirm with inquiry
Product information
Product Overview
The D4SL-N4EFA-D is an Omron D4SL-N series guard-lock door switch with a solenoid lock, 1,300 N holding force, 24 V solenoid, 2 NC + 1 NO door contacts and 1 NC + 1 NO lock-monitor contacts, IP67 rated.
This page is written for buyers and maintenance engineers sourcing D4SL-N4EFA-D as a new part or a replacement. Every specification below is taken from Omron’s own published catalogue data for this model; no third-party or estimated figures are used, and where Omron publishes two different figures for the same parameter, both are shown.
Omron catalogue position: Safety › Safety Switches › D4SL-N. Official catalogue code for this model: D4SL-N4EFA-D.
Why Buyers Specify This Model
1,300 N holding force, power-to-unlock
The mechanically locked guard interlock holds the door against 1,300 N and releases when the 24 V solenoid is energised (power to unlock) — the fail-safe-to-lock configuration used where a guard must not open while a machine runs.
Four contacts for a proper safety circuit
2 NC + 1 NO door contacts plus 1 NC + 1 NO lock-monitor contacts let the safety relay monitor both the guard position and the lock state independently.
Key-operated with adjustable operation direction
The D4SL-N uses an operation key with a standard metal key, front and back key positions, and an adjustable direction of operation — which is what makes it usable on sliding and hinged guards in either orientation.
IP67, M20 conduit, 179.9 mm body
Degree of protection is IP67 in a 179.9 mm × 39 mm × 39 mm cuboid body with a single M20 conduit entry and a terminal-block connection. Ambient range is -10 to 55 °C.
Technical Specifications (Official Omron Catalogue Data)
| Parameter | Official value |
|---|---|
| Door switch type | Key-operated |
| Guard-lock | Yes |
| Material housing | Plastic |
| Material head | Resin |
| Ambient temperature (operating) | -10-55 °C |
| Holding force | 1300 N |
| Direction of operation | Adjustable |
| Door contacts NC | 2 |
| Door contacts NO | 1 |
| Lock monitor contacts NC | 1 |
| Lock monitor contacts NO | 1 |
| Lock/Release key type | Standard key |
| Lock/Release key position | Front + Back |
| Lock/Release key material | Metal |
| Solenoid voltage | 24 V |
| LED indicator | Yes |
| Connection method | Terminal block |
| Degree of protection (IP) | IP67 |
| Conduit size | M20 |
| Number of conduits | 1 |
| Shape | Cuboid |
| Overall length of sensor | 179.9 mm |
| Height of sensor | 39 mm |
| Width of sensor | 39 mm |
| Switch without actuator | Yes |
| Lock/Release logic | Power to unlock (Mechanical lock) |
Source: Omron official product catalogue data for D4SL-N4EFA-D, published at industrial.omron.eu. Values are reproduced as published by Omron. Where the official data carries a condition or footnote, the headline figure is shown — request the official datasheet for the qualified figure.
Lifecycle & Availability
Omron’s official product data for this model carries no end-of-production or discontinuation notice — it is listed as a current catalogue item. That is the lifecycle status as published by Omron, not a stock statement on our side.
Availability, condition of supply and lead time are quoted per enquiry because they depend on quantity and on where the goods are held. Tell us the quantity and the date you need it and we will answer with a firm position rather than a promise.
Official Documentation
These are Omron’s own documents for this model and its family. Download them directly from Omron’s document server:
Full technical detail — conversion periods, wiring diagrams, derating and installation requirements — is in these documents. If you need a specific figure we do not show here, ask and we will point you to the exact page rather than paraphrase it.
Matching Accessories and Spare Parts
The list below is Omron’s own accessory and spare-part association for this model — the parts Omron itself couples to it for commissioning and for maintenance. Buying them together avoids the usual problem of a spare unit arriving without the bracket, key or battery needed to run it.
Associated accessories
| Part | Official description |
|---|---|
| D4SL-NK1 | Operation key for D4SL-N; horizontal mounting |
| D4SL-NK1G | Operation key for D4SL-N; horizontal mounting, cushion rubber |
| D4SL-NK1S | Operation key for D4SL-N; horizontal mounting, no cushion rubber (short type) |
| D4SL-NK2 | Operation key for D4SL-N; vertical mounting |
| D4SL-NK2G | Operation key for D4SL-N; vertical mounting, cushion rubber |
| D4SL-NK3 | Operation key for D4SL-N; adjustable mounting (horizontal) |
| D4SL-NK5 | Operation key for D4SL-N; adjustable (horizontal/vertical) |
| D4SL-NSK10-LK | D4SL-N slide/lockout key system, without inner lever |
| D4SL-NSK10-LKH | D4SLN slide/lockout key system, with inner lever |
Ordering This Part
Send us the full catalogue number D4SL-N4EFA-D, the quantity, your delivery address and the date you need the goods. If the part is a replacement, attach a photograph of the existing unit’s nameplate — it removes any doubt about the revision, the output type or the supply voltage, which are the three things that most often cause a wrong part to be shipped.
We do not publish stock, condition or lead time as fixed figures here, because they change: they are quoted per enquiry against the quantity and date you actually need. If a machine is down, say so and give us the required window — that is the information that determines how we source it.
Frequently Asked Questions
Does the operation key come with the switch?
No. Omron lists the operation keys as separate accessories — D4SL-NK1, NK2, NK3 and NK5 for different mounting orientations, plus NK1G/NK1S variants with or without cushion rubber. Select the key that matches your mounting direction; they are listed in the accessories section below.
Power to unlock or power to lock?
This model is power to unlock with a mechanical lock, which means the guard stays locked if power is lost. Confirm this against your risk assessment: power-to-lock behaviour is required for many applications but not all.
Is it a complete safety function on its own?
No. It is the interlock device; it must be wired into a safety relay or safety controller. Omron lists this model as suitable for safety functions, and the safety architecture is defined by the relay or controller you pair it with.
What is the D suffix?
It denotes the model variant in Omron’s D4SL-N coding, which also carries the solenoid voltage and contact arrangement. The solenoid on this unit is 24 V; confirm your control voltage against the nameplate before ordering.
Production status?
Current — no end-of-production notice in Omron’s official catalogue data.
MODEL INQUIRY
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